This OS image only can upgrade from
Acer_AV051_A110_RV00RC07_WW_CUS1Steps of Upgrade: 1. Check Image
version of your A110 if it's Acer_AV051_A110_RV00RC07_WW_CUS12.
Download OS file for the same SKU with your A110 and Upgrade OS (
SOP is packed with OS file)※OS upgrade cannot do *SKU conversion*
and downgrade version. Wrong SKU may cause update failure, You
can only update your Image version on the Same SKU*How to check
Image version of your A110?Path: [Settings]-->[About
tablet]-->[Image version]

This OS image only can upgrade from
Acer_AV051_A110_RV00RC07_WW_CUS1Steps of Upgrade: 1. Check Image
version of your A110 if it's Acer_AV051_A110_RV00RC07_WW_CUS12.
Download OS file for the same SKU with your A110 and Upgrade OS (
SOP is packed with OS file)※OS upgrade cannot do *SKU conversion*
and downgrade version. Wrong SKU may cause update failure, You
can only update your Image version on the Same SKU*How to check
Image version of your A110?Path: [Settings]-->[About
tablet]-->[Image version]